Super-FRS multiplets
07.09.2015 |
On July 1st 2015, GSI awarded after extensive contract negotiations, ASG Superconductors SpA in Genoa (Italy) to design and manufacture the superconducting multiplets of the Super-FRS, which are one of its most important components. ASG has a long-standing experience in developing superconducting magnets. They provided, for example, one-third of the LHC dipole magnets at CERN and they participated in the development of the GLAD magnet system for the R3B experiment at FAIR. The contract amount is about 50 million Euros, which will be the largest purchase within the FAIR accelerator.
Only the application of superconducting magnets assures an efficient use of relativistic secondary beams characterized by a high phase-space. Therefore, focussing (quadrupole) and correction magnets (sextupole, octupole, and steerer) of the Super-FRS are arranged in common helium cryostats forming a so-called multiplet. In total 33 multiplets are required for the Super-FRS.
The largest multiplet consists of nine individual magnets with a length of approximately 7 m, a height of more than 4 m, a width of 2.5 m, and an overall weight of more than 60 tons. Technical challenges will be the required precision of the optical axis (a maximum deviation of 0.2 mm of one individual magnet compared to the overall axis of the multiplet is allowed) as well as the required design pressure of 20 bar.
In the following two years it is foreseen to develop two first-of-series devices. These will be tested extensively at CERN prior the series production of the remaining 31 multiplets.